What is the natural synergist of urea?

What is the natural synergist of urea? Please introduce that the urea nitrogen fertilizer consumed in China's agriculture is close to 20 million tons per year (pure nitrogen). The urea nitrogen fertilizer lost through gaseous volatilization, leaching and runoff has reached 10 million tons, equivalent to more than 21 million tons of urea, with a direct economic loss of 45 billion yuan. it not only causes a huge waste of energy and resources, but also poses a great threat to the environment. In 2011, the output of nitrogen fertilizer in China reached 41.79 million tons, of which the output of urea was 26.567 million tons, accounting for 63.6% of the total output of nitrogen fertilizer. The development of new urea products with high production capacity, low cost, high utilization rate, low loss, good yield increase and environment-friendly efficiency is of great significance in saving resources, realizing the coordinated development of agricultural production and ecology, saving cost and increasing efficiency, saving energy and reducing emissions. Value-added urea is a urea value-added product produced by adding simple equipment and directly adding synergist to urine on the basis of basically unchanged urea production process. Synergist refers to the substances obtained by modification of natural substances such as seaweed, humic acid and amino acids, which can improve the utilization rate of urea nitrogen fertilizer. Value-added urea products have the characteristics of high production capacity, low cost and good effect. The value-added urea products should comply with the following principles: the nitrogen content is not less than 46%, which meets the national standards of urea products; the quality standard of value-added urea with synergists can be established, which has conventional detectability; the synergist is micro and efficient, and the addition amount is 0.5%. -5%. The synergist is a natural substance and its extract or compound, which is harmless to the environment, crops and human body. After nearly 10 years of efforts, the new fertilizer team of the Chinese Academy of Agricultural Sciences has developed a series of urea synergists such as fermented seaweed liquid, zinc humic acid, cereal and corresponding new value-added urea products. Alginic acid synergist is a small molecular synergist of fermented seaweed liquid prepared by microbial fermentation using seaweed as the main raw material. Urea alginate is produced by conventional urea process, and the addition amount of synergist is 10-30kg per ton of urea. The organic substances and physiologically active substances such as alginic acid, indoleacetic acid, gibberellin and naphthylacetic acid contained in fermented seaweed synergist can promote crop root growth, improve root activity and enhance crop nutrient absorption ability, inhibit soil urease activity and reduce ammonia volatilization loss of urea. The substances in the synergistic solution of fermented seaweed react with urea and slow down the release and transformation of urea in soil through hydrogen bonding and other forces. In addition, urea alginate can also play a role in drought resistance, saline-alkali penetration resistance, cold resistance, sterilization and improving the quality of agricultural products. The color of urea alginate is light yellow to light brown, nitrogen content ≥ 46%, alginic acid content ≥ 0.03%, urea residual difference rate ≥ 10%, ammonia volatilization inhibition rate ≥ 10%. Zinc humic acid synergist is a urea synergist prepared by chelating technology using weathered coal and lignite as main raw materials, extracting macromolecule active humic acid by microbial fermentation technology. The addition amount of 10-50kg per ton of urea is used to produce zinc humic acid urea products by conventional urea process. Highly active humic acid contains a large number of carboxyl, phenolic hydroxyl, carbonyl and other active groups and trace element zinc, which can promote crop growth, enhance photosynthesis and have a good inhibitory effect on soil urease activity. slow down the decomposition and release of urea in soil. In addition, zinc humic acid urea can also improve soil, improve soil fertility, supplement and activate soil trace elements and so on. The color of zinc humic acid urea is brown to black, nitrogen content ≥ 46%, humic acid content ≥ 0.15%, humic acid precipitation rate ≤ 40%. Cereal synergist is a urea synergist prepared by polymerization with natural glutamic acid as the main raw material and produced by chelating technology. The addition amount of 10-30kg per ton of urea was used to produce cereal urea products by conventional urea process. Glutamate in cereal is the highest content of amino acid in plants. At the same time, glutamate is the precursor of many kinds of amino acid synthesis in plants, which plays an important role in the growth and development of plants. Glutamate can form glutamine in plants, store nitrogen and eliminate the toxic effects caused by high ammonia concentration. Therefore, the value-added urea product can promote crop growth, improve the storage form of nitrogen in crop plants, reduce the harm of ammonia to crops, improve nutrient utilization, and supplement trace elements in soil. The color of cereal urea products is white to light yellow, nitrogen content ≥ 46%, glutamic acid content ≥ 0.08%, ammonia volatilization inhibition rate ≥ 10%. Click to get more nitrogen, phosphorus, potassium application techniques click to get more chemical fertilizer application techniques